@mixin single-screen($selector) {
  html#{$selector} {
    border: 0;
    padding: 0;
    margin: 0;
    height: 100%;
    width: 100%;
    overflow: hidden;
    body {
      border: 0;
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
      overflow: hidden;
    }
  }
}